1 files changed, 222 insertions, 0 deletions
diff --git a/java/com/android/dialer/compat/CompatUtils.java b/java/com/android/dialer/compat/CompatUtils.java
new file mode 100644
index 000000000..673cb709b
--- /dev/null
+++ b/java/com/android/dialer/compat/CompatUtils.java
@@ -0,0 +1,222 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.dialer.compat;
+
+import android.os.Build;
+import android.support.annotation.Nullable;
+import android.text.TextUtils;
+import android.util.Log;
+import java.lang.reflect.InvocationTargetException;
+
+public final class CompatUtils {
+
+  private static final String TAG = CompatUtils.class.getSimpleName();
+
+  /** PrioritizedMimeType is added in API level 23. */
+  public static boolean hasPrioritizedMimeType() {
+    return SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.M) >= Build.VERSION_CODES.M;
+  }
+
+  /**
+   * Determines if this version is compatible with multi-SIM and the phone account APIs. Can also
+   * force the version to be lower through SdkVersionOverride.
+   *
+   * @return {@code true} if multi-SIM capability is available, {@code false} otherwise.
+   */
+  public static boolean isMSIMCompatible() {
+    return SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.LOLLIPOP)
+        >= Build.VERSION_CODES.LOLLIPOP_MR1;
+  }
+
+  /**
+   * Determines if this version is compatible with video calling. Can also force the version to be
+   * lower through SdkVersionOverride.
+   *
+   * @return {@code true} if video calling is allowed, {@code false} otherwise.
+   */
+  public static boolean isVideoCompatible() {
+    return SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.LOLLIPOP) >= Build.VERSION_CODES.M;
+  }
+
+  /**
+   * Determines if this version is capable of using presence checking for video calling. Support for
+   * video call presence indication is added in SDK 24.
+   *
+   * @return {@code true} if video presence checking is allowed, {@code false} otherwise.
+   */
+  public static boolean isVideoPresenceCompatible() {
+    return SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.M) > Build.VERSION_CODES.M;
+  }
+
+  /**
+   * Determines if this version is compatible with call subject. Can also force the version to be
+   * lower through SdkVersionOverride.
+   *
+   * @return {@code true} if call subject is a feature on this device, {@code false} otherwise.
+   */
+  public static boolean isCallSubjectCompatible() {
+    return SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.LOLLIPOP) >= Build.VERSION_CODES.M;
+  }
+
+  /**
+   * Determines if this version is compatible with a default dialer. Can also force the version to
+   * be lower through {@link SdkVersionOverride}.
+   *
+   * @return {@code true} if default dialer is a feature on this device, {@code false} otherwise.
+   */
+  public static boolean isDefaultDialerCompatible() {
+    return isMarshmallowCompatible();
+  }
+
+  /**
+   * Determines if this version is compatible with Lollipop Mr1-specific APIs. Can also force the
+   * version to be lower through SdkVersionOverride.
+   *
+   * @return {@code true} if runtime sdk is compatible with Lollipop MR1, {@code false} otherwise.
+   */
+  public static boolean isLollipopMr1Compatible() {
+    return SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.LOLLIPOP_MR1)
+        >= Build.VERSION_CODES.LOLLIPOP_MR1;
+  }
+
+  /**
+   * Determines if this version is compatible with Marshmallow-specific APIs. Can also force the
+   * version to be lower through SdkVersionOverride.
+   *
+   * @return {@code true} if runtime sdk is compatible with Marshmallow, {@code false} otherwise.
+   */
+  public static boolean isMarshmallowCompatible() {
+    return SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.LOLLIPOP) >= Build.VERSION_CODES.M;
+  }
+
+  /**
+   * Determines if the given class is available. Can be used to check if system apis exist at
+   * runtime.
+   *
+   * @param className the name of the class to look for.
+   * @return {@code true} if the given class is available, {@code false} otherwise or if className
+   *     is empty.
+   */
+  public static boolean isClassAvailable(@Nullable String className) {
+    if (TextUtils.isEmpty(className)) {
+      return false;
+    }
+    try {
+      Class.forName(className);
+      return true;
+    } catch (ClassNotFoundException e) {
+      return false;
+    } catch (Throwable t) {
+      Log.e(
+          TAG,
+          "Unexpected exception when checking if class:" + className + " exists at " + "runtime",
+          t);
+      return false;
+    }
+  }
+
+  /**
+   * Determines if the given class's method is available to call. Can be used to check if system
+   * apis exist at runtime.
+   *
+   * @param className the name of the class to look for
+   * @param methodName the name of the method to look for
+   * @param parameterTypes the needed parameter types for the method to look for
+   * @return {@code true} if the given class is available, {@code false} otherwise or if className
+   *     or methodName are empty.
+   */
+  public static boolean isMethodAvailable(
+      @Nullable String className, @Nullable String methodName, Class<?>... parameterTypes) {
+    if (TextUtils.isEmpty(className) || TextUtils.isEmpty(methodName)) {
+      return false;
+    }
+
+    try {
+      Class.forName(className).getMethod(methodName, parameterTypes);
+      return true;
+    } catch (ClassNotFoundException | NoSuchMethodException e) {
+      Log.v(TAG, "Could not find method: " + className + "#" + methodName);
+      return false;
+    } catch (Throwable t) {
+      Log.e(
+          TAG,
+          "Unexpected exception when checking if method: "
+              + className
+              + "#"
+              + methodName
+              + " exists at runtime",
+          t);
+      return false;
+    }
+  }
+
+  /**
+   * Invokes a given class's method using reflection. Can be used to call system apis that exist at
+   * runtime but not in the SDK.
+   *
+   * @param instance The instance of the class to invoke the method on.
+   * @param methodName The name of the method to invoke.
+   * @param parameterTypes The needed parameter types for the method.
+   * @param parameters The parameter values to pass into the method.
+   * @return The result of the invocation or {@code null} if instance or methodName are empty, or if
+   *     the reflection fails.
+   */
+  @Nullable
+  public static Object invokeMethod(
+      @Nullable Object instance,
+      @Nullable String methodName,
+      Class<?>[] parameterTypes,
+      Object[] parameters) {
+    if (instance == null || TextUtils.isEmpty(methodName)) {
+      return null;
+    }
+
+    String className = instance.getClass().getName();
+    try {
+      return Class.forName(className)
+          .getMethod(methodName, parameterTypes)
+          .invoke(instance, parameters);
+    } catch (ClassNotFoundException
+        | NoSuchMethodException
+        | IllegalArgumentException
+        | IllegalAccessException
+        | InvocationTargetException e) {
+      Log.v(TAG, "Could not invoke method: " + className + "#" + methodName);
+      return null;
+    } catch (Throwable t) {
+      Log.e(
+          TAG,
+          "Unexpected exception when invoking method: "
+              + className
+              + "#"
+              + methodName
+              + " at runtime",
+          t);
+      return null;
+    }
+  }
+
+  /**
+   * Determines if this version is compatible with Lollipop-specific APIs. Can also force the
+   * version to be lower through SdkVersionOverride.
+   *
+   * @return {@code true} if call subject is a feature on this device, {@code false} otherwise.
+   */
+  public static boolean isLollipopCompatible() {
+    return SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.LOLLIPOP)
+        >= Build.VERSION_CODES.LOLLIPOP;
+  }
+}